To me, this is a secret signal in the stock market that few people can see.
The way you use it. Is you buy when it is green, and it the green lines converge until it is red, and that's when you sell.
It's meant for any market. Buy when green, sell when red. The thicker the green, the lower the price will be. And the thicker the red, the higher the price will be.
I've also included signals like Strong Buy (SB), Strong Sell (SS), and H for High, and L for Low. You have to be careful though not to buy a stock that is continually reaching new lows, ideally you want to buy on the last low signal for less risky buys. Experiment with it. You'll find it is a truly incredible indicator.